U2 played in the NYC subway last night

It seems that U2, in the midst of preparing for their iNNOCENCE + eXPERIENCE tour, gave some NYC subway riders a free concert last night. The band, which is in town to play The Tonight Show on Friday (and in all actuality was probably filming for it), ran through a few numbers on the platform of the S train at Grand Central. From the pictures, it looks like Bono, Edge & Co. donned some kind of shabby busker costumes for the performance (for which our recent editor Mario Batali was front row). Take a look below—We expect they'll be wearing something a bit classier when their mega tour comes to Madison Square Garden in July.